body, html 
    line-heigth: 1
    font-weight: 200
    font-famliy: 'PingFang SC','STheitiSC-Light','Helcetica-Light',arial,
    sans-serif

.clearfix
    display: inline-block
    &::after
        display: block
        content: "."
        height: 0 
        line-height: 0
        clear: both
        visibility: hidden


@media (-webkit-min-device-pixel-ratio: 1.5),(-min-device-pixel-ratio: 1.5)
    .border-1px
        &::after
            -webkit-transform: scaleY(0.7)
            transform: scaleY(0.7)

@media (-webkit-min-device-pixel-ratio:2),(min-device-pixel-ratio:2)
    .border-1px
        &::after
            -webkit-transform:scaleY(0.5)
            transform:scaleY(0.5)
